.308 UPPER RECEIVER ROD BLACK

16IN 1x7 LW Mid-Length Barrel Assembly w/ 15IN MLOK

2A AR15 FORGED UPPER RECEIVER

2A AR15 FORGED UPPER RECEIVER W/FA

2A BALIOS-LITE BILLET UPPER RECEIVER

2A PALOUSE-LITE FORGED RECEIVER SET

308 AR M5 UPPER RECEIVER

308 AR M5 UPPER RECEIVER

AERO APAR620201AC EPC-9 9MM UPPER BLK

AERO COMPLETE UPPER 5.56 20" A2 BLK

AERO M4E1 ASSEMBLED UPPER BLACK

AERO M4E1 ASSEMBLED UPPER FDE

AERO M4E1-T UPPER 300BLK 8" FDE

AERO M4E1-T UPPER 5.56 10.5" FDE

AERO M4E1-T UPPER 5.56 14.5" BLK

Aero Precision APAR308503AC M5 Assembled Upper 308 Win/7.62x51mm NATO Anodized Black

Aero Precision APAR308505AC M5 Assembled Upper Receiver .308 FDE Cerakote

Aero Precision APAR501603AC AR-15 Assembled Upper Receiver Multi-Caliber Black

Aero Precision APAR501603C AR-15 Stripped Upper Receiver Multi-Caliber Black

Aero Precision APAR501801AC AR-15 Assembled Upper Receiver Multi-Caliber Flat Dark Earth Cerakote

Aero Precision APAR501801C AR-15 Stripped Upper Receiver Multi-Caliber Flat Dark Earth Cerakote

AERO SOLUS LW SHORT ACTION .478

AERO SOLUS LW SHORT ACTION .540

AEROPRECISION AR15 COMPLETE UPPER 10.5" CARBINE BARREL

AEROPRECISION AR15 COMPLETE UPPER 16" MID-LENGTH BARREL

AEROPRECISION M4E1-T COMPLETE UPPER 10.5" 5.56 BARREL

AEROPRECISION M4E1-T COMPLETE UPPER 16" MID-LENGTH BARREL

AEROPRECISION M4E1-T COMPLETE UPPER 8" BARREL 300BLK

AEROPRECISION M5 COMPLETE UPPER 16" BARREL .308 RM15

ALEX PISTOL UPPER 50BEO 12 BLK

ALEXANDER ARMS LLC KIT50 OEM 16.50" Black

ALEXANDER UPPER RECEIVER AR15 .17HMR 18" S/S FLUTED W/KIT

ALEXANDER UPPER RECEIVER AR15 TACT .50 BEOWULF THREADED FDE

AM COMPLETE UPPER 223REM AR15 16.25 POLY HANDGUA

AM UPPER 223REM 5.56 20 NO BCG OR CHARGING HANDL

AM UPPER AR15 223REM 16 W.FRONT SIGHT BASE

AM UPPER AR15 223REM 16.25 POLY HANDGUARD

AM UPPER RECEIVER AR15 A3 ASSEMBLED

AM UPPER RECEIVER AR15 A3 ASSEMBLED W/ CH

AM UPPER RECEIVER AR15 A3 W/ FORWARD ASSIST

ANGSTADT UPPER UDP-9 9MM 6 W/BLAST CAN

ANGSTADT UPPER UPD-9 9MM 4.5 W/BLAST CAN

ANGSTADT VANQUISH 9 ISR 16" UPR

APF UPPER AR10 CHRG HAND DUST COVER FWD ASS

APF UPPER VARMINT 224VAL 22 WITH BCG SS

AR-15 A2 UPPER RECEIVER

AR-15 SUPER DUTY MOD1 5.56X45 NATO COMPLETE UPPER RECEIVER

AR-15 SUPER DUTY MOD1 5.56X45 NATO COMPLETE UPPER RECEIVER

ATI 410 UPPER KIT 18" 410 GA UPPER 410 BUFFER & SPRING 5 RND MAG

ATI 450 BUSHMASTER UPPER 16" BBL PARKERIZED 15" MLOK RAIL

ATI ALPHA MAXX 410 UPPER SHOTGUN KIT .410 GA 18.5" BBL SMOOTH BORE 13" POLY MLOK F/U SIGHTS 5RD

ATI POLYMER HYBRID STRIP UPPER MULTI CAL W/ INSERT

ATI POLYMER HYBRID STRIP UPPER MULTI CAL W/ INSERT BATTLEFIELD GREEN

ATI POLYMER HYBRID STRIP UPPER MULTI CAL W/ INSERT FLAT DARK EARTH

ATI POLYMER HYBRID STRIP UPPER MULTI CAL W/ INSERT SNIPER GREY

BAD WORKHORSE 556 UPRR 16" BLK N/BCG

BAD WORKHRSE 556 UPRR 10.5 BLK N/BCG

BATTLE ARMS AR9 PISTOL CALIBER UPPER RECEIVER BILLET BLACK

BCM MK2 Laser Engraved Stripped Upper Receiver Optic Ready

Black Rain BROSPEC15UR Spec15 Forged Upper 223 Rem,5.56x45mm NATO Black Hardcoat Anodized

BLACK RAIN UPPER 458SOCOM 16" BLK

Bravo LRG-STK-MOD BCM Multi-Caliber Brl Finish

Bushmaster 91822 A3 AR-15 Complete Upper 223 /5.56 16" Matte

Bushmaster Bravo Zulu AR Upper Assembly - Black | .350 Legend | 16" Barrel | 14" BFI Free Float M-LOK Rail | Snake Charmer Muzzle Brake

Bushmaster Bravo Zulu AR Upper Assembly - Black | .450 Bushmaster | 16" Barrel | 14" BFI Free Float M-LOK Rail | Snake Charmer Muzzle Brake

Bushmaster Bravo Zulu AR Upper Assembly - Black | .450 Bushmaster | 20" Barrel | 14" BFI Free Float M-LOK Rail | Snake Charmer Muzzle Brake

Bushmaster Bravo Zulu AR Upper Assembly - Black | 5.56 NATO | 16" Barrel | 14" BFI Free Float M-LOK Rail | Snake Charmer Muzzle Brake

BUSHMSTR 0040008BLK M4 PTRLMN FT A4 UPPER 556 20IN

C.DALY AR 410 UPPER .410 19" 5RD

CHARLES DALY UPPER 410GA 19 5RD

Chiappa Firearms 500095 M4-22 Gen-II Pro Rifle Conversion 22 LR 16" Steel Heavy Contour Black Parkerized Brl Finish

CHIAPPA UPPER 16\" BBL MFOUR-22 GEN-II PRO 11.8\" FOREND 2-10RD

CMMG 30BC239AB Dissent MK4 300 Blackout 10.50", Left Side Charging Handle, Armor Black, OEM Zeroed Linear Comp, 9.60" M-LOK Handguard for AR-Platform, Picatinny End Plate

CMMG 57BA8AEAB Dissent MK4 5.7x28mm 6.50", Left Side Charging Handle, Armor Black, OEM Zeroed Linear Comp, 4.60" M-LOK Handguard for AR-Platform, Picatinny End Plate

CMMG 99B80E4AB Dissent 9mm Luger 10.50", Left Side Charging Handle, Armor Black, OEM Zeroed Linear Comp, 9.60" M-LOK Handguard for AR-Platform, Picatinny End Plate

CMMG BANSHEE MK4 UPPER GROUP 22LR 4.5 BLK

CMMG BANSHEE MK4 UPPER GROUP 22LR 9 BLK

CMMG BANSHEE UPPER GROUP 9MM 8 BLK

CMMG BARREL SUB-ASSM 16 MT 4140CM 350LEG

CMMG BBL SUB ASSEMBLY 223REM 12.5 MULTI ROLE

CMMG RESOLUTE MK4 UPPER GROUP 22LR 17 BLK

CMMG RESOLUTE MK4 UPPER GROUP 300BLK 16.1 BLK

CMMG RESOLUTE UPPER GROUP 5.7X28 16.1 BLK

CMMG RESOLUTE UPPER GROUP 9MM 16.1 BLK

CMMG UPPER BANSHEE 9MM 5" BLK

CMMG UPPR BANSHEE 5.7X28MM 5" BLK

CMMG UPPR RSLT MK4 350LEG 16.1" BLK

COLT EPR UPPER KIT 5.56 11.5" BLK

COLT EPR UPPER KIT 5.56 14.5" BLK

COLT EPR UPPER KIT 5.56 16" BLK

COLT LE6943 UPPER 556NATO 11.5"

COLT M4 UPPER 5.56 11.5" LW BLK

Colt Mfg LE6920CK LE6920CK Upper Conversion Kit 223 Rem,5.56 NATO Black 16.10"

Colt Mfg LE6920CKNHG LE6920 Upper Conversion Kit 223 Rem,5.56 NATO 16"

Colt Mfg LE6921CK Upper Conversion Kit 223 Rem,5.56 NATO 14.50"

Colt Mfg LE6921CK-NHG LE6921 Upper Conversion Kit 223 Rem,5.56 NATO 14.50"

Daniel Defense 2300408013011 DDMK18 Upper FDE 223 Rem,5.56x45mm NATO 10.30"

Daniel Defense DD4 RIII URG FDE 16" Brl

DANIEL DEFENSE UPPER DD5 V3 7.62 16 MLOK

DANIEL DEFENSE UPPER DD5 V4 6.5CR 18 MLOK

DANIEL DEFENSE UPPER DD5 V4 7.62 18 MLOK

DANIEL DEFENSE UPPER DD5 V5 260REM 20

DANIEL DEFENSE UPPER DD5 V5 6.5CR 20 MLOK

DD M4A1 UPPER URG 14.5"PB 556 FDE

DD M4V7 LW UPPER 556 16" MLOK BLK

DD M4V7 UPPER 556 16" MLOK BLK

DD M4V7S UPPER URG 11.5" 556NATO

DD4 RIII URG 5.56MM 11.5" BLK

DD4 RIII URG 5.56MM 11.5" FDE

DD4 RIII URG 5.56MM 16" BLK

DDM4 300S SBR URG 300BLK 10.3

DDM4 V7 PRO URG 5.56 18"

Del-Ton Dissipator Complete AR15 Upper Assembly - Black | 5.56NATO | 16" Heavy Profile Barrel | Flat Top Receiver | A2 Front Sight Post & Flash Hider

DELTON UPPER RECEIVER 5.56X45 16" BBL. A3 MID-LENGTH PRE-BAN

DELTON UPPER RECEIVER 5.56X45 20" BBL. A3 FLAT TOP PRE-BAN

DPMS AR-15 COMPLETE UPPER 5.56 NATO 16IN BBL 1/7 A2 FS MBUS REAR INCLUDES BCG AND CHARGING HANDLE

DPMS AR-15 COMPLETE UPPER 5.56 NATO 16IN BBL 1/7 MBUS INCLUDES BCG AND CHARGING HANDLE

DSC CHARGING HANDLE AR15 STANDARD

DTI RIFLE KIT 223REM 16 HVY BBL M4 BLK

DTI RIFLE KIT 223REM 16 M4 MOE FDE

DTI RIFLE KIT 223REM 16 M4 MOE OD GRN

DTI RIFLE KIT 223REM 20 GOVT PROFILE BLK

DTI UPPER RECEIVER AR15 M4 5.56 16 FLATTOP PRE

EPC 9 THREADED UPPER RECEIVERS

ERGO MSR GRIP BLK

FAB DEF AK47 UPPER/LOWER HNDGRD SET

FAXON 9MM BOLT CARRIER GROUP FOR GLOCK AND COLT NITRIDED

FAXON ARAK-21 COMPLETE UPPER RECEIVER 5.56 12.5" BARREL

FAXON ARAK-21 COMPLETE UPPER RECEIVER 5.56 16" BARREL

FAXON ARAK-21 COMPLETE UPPER RECEIVER 7.62X39 16" BARREL

FAXON FF-22 10/22 RECEIVER ANODIZED

FAXON FX7 ACTION .308 BOLT FACE MATTE DLC FINISH

FN BBL ASSEMBLY SCAR 16S 10"

FN BBL ASSEMBLY SCAR 17S 13"

GE SUPER DUTY MOD1 5.56 10.3 URG BLK

GE SUPER DUTY MOD1 5.56 10.3 URG DDC

GE SUPER DUTY MOD1 5.56 11.5 URG BLK

GE SUPER DUTY MOD1 5.56 11.5 URG DDC

GE SUPER DUTY MOD1 5.56 16 URG BLK

GE SUPER DUTY MOD1 5.56 16 URG DDC

GEMTECH INTEGRA 15-22 SPPRSSD UPPER

GEMTECH INTEGRA 556 SUPPRESSED UPPER

GLFA AR15 .450 BUSHMASTER 18" NIT BBL BLACK

GREY GHOST PRECISION GGPC GGP Cornerstone Forged Lower AR Platform Multi-Caliber Black Hardcoat Anodized

GVAC UPPER GROUP 5.56MM 16.1"

HECKLER AND KOCH MR556 UPPER RECR KIT

HENRY HOLSTER FOR H006 44LC 44MAG 357MAG

HK MR556 UPPER RECEIVER KIT 9 MRS HANDGUARD

IFC BOX MAG 410ARU 9 RND

IFC MAG T-14 410GA 5RD

JP ENHANCED BOLT CARRIER 9MM

JP LMOS CARRIER POLISHED SS

JP LMOS CARRIER SS QPQ W/O BUFFER

JP LOW MASS BOLT CARRIER FOR LARGE FRAME 308

JP LOW MASS BOLT CARRIER FOR LARGE FRAME 308

JP ULTRA LMOS CARRIER SMALL FRAME 223REM

JP VMOS BOLT CARRIER SS LARGE FRAME QPQ BLK

LANTAC USR FORGED UPPER RECEIVER BLK

LBE AR 556NATO 1/7 TWIST 10.5" M4 BL

LBE AR 556NATO 1/7 TWIST 7" M4 BBL

LBE AR EXTRACTOR KIT MIL SPEC

LBE AR15 M4 STRIPPED UPPER RECEIVER

LBE BBL 16" 9MM NITRIDE 1/10

LBE Unlimited ARUPPER Upper Receiver with Forward Assist & EPC 5.56x45mm NATO Black

LOCKDOWN HANDGUN AR UPPER HANGER

LUTH AR 16" LTWT BBL COMP UPPER 5.56

LUTH AR 24" BULL BBL COMP UPPER 5.56

LUTH AR 308 UPPER RECEIVER

LUTH AR A3 ASSEMBLED 308 RECEIVER

LUTH AR A3 UPPER RECEIVER

LUTH AR COMPLETE UPPER 11.5 LW

LUTH AR RIFLE KIT BULL 16 W/ ADJ STOCK

LUTH AR RIFLE KIT BULL 16 W/ FIXED STOCK

LUTH AR RIFLE KIT BULL 20 W/ ADJ STOCK

LUTH AR RIFLE KIT BULL 20 W/ FIXED STOCK

LUTH AR RIFLE KIT LW 16 W/ ADJ STOCK

LUTH AR RIFLE KIT LW 16 W/ FIXED STOCK

LUTH AR UPPER RCVR ASMB W/CHARG HNDL

LWRC IC DI UPPER 5.56 10.5 BLACK

LWRC ICSPR 5.56 16'' UPPER

LWRC REPR MKII UPPER 22 6.5CREED BLK

LWRC REPR MKII UPPER 22 6.5CREED BLK PROOF

M4A1 RIII URG 5.56MM 14.5" BLK

M4A1 RIII URG 5.56MM 14.5" FDE

M4E1 ASSEMBLED UPPER RECEIVER THREADED 5.56MM FDE

M4E1 ASSEMBLED UPPER RECEIVER THREADED 5.56MM FDE

M4E1 THREADED 350 LEGEND ASSEMBLED UPPER RECEIVER

M4E1 THREADED 350 LEGEND ASSEMBLED UPPER RECEIVER

M5E1 COMPLETE UPPER

M5E1 COMPLETE UPPER

MAXIM PDX UPPER 300BLK 5.5" ARID

MAXIM PDX UPPER 300BLK 5.5" BLK

MAXIM PDX UPPER 5.56 5.5" ARID

MAXIM PDX UPPER 5.56 5.5" BLK

MCX-SPEAR LT AR CONVERSION KIT 5.56 NATO

MCX-SPEAR LT AR CONVERSION KIT 5.56 NATO

MCX-SPEAR LT AR CONVERSION KIT 7.62X39MM

MCX-SPEAR LT AR CONVERSION KIT 7.62X39MM

MI UPPER RECEIVER AR15 5.56MM 10.5" 1:7 CARBINE M-LOK NO BCG

MK12 SPR URG 5.56 18"

MK16 URG-I COMPLETE UPPER RECEIVERS 5.56MM

MK16 URG-I COMPLETE UPPER RECEIVERS 5.56MM

MK16 URG-I COMPLETE UPPER RECEIVERS 5.56MM

MK18 RIII URG 5.56MM 10.3" BLK

MK18 RIII URG 5.56MM 10.3" FDE

MSBRG 514 KIT 12/14/CYL W/ASSEMBLY

NEMO BILLET UP/LOW RCVR AR MATCHED

NORDIC 16" .22LR COMPLETE UPPER

NORDIC 9MM BARREL 8.5" BLK

NORDIC NC1 EXTNDD LNGTH HNDGRD 15.5"

NORDIC NC15 EXTRUDED UPPER RCVR BLK

NOVESKE UPPER/LOWER SET GEN3 BLK

NOVESKE UPPER/LOWER SET GEN3 FDE

ODIN UPPER RECEIVER BILLET BLK AR-15 9MM NO FOWARD ASSIST

ODIN UPPER RECEIVER BILLET BLK AR-15 NO FOWARD ASSIST

ODIN UPPER RECEIVER BILLET FDE AR-15 NO FOWARD ASSIST

Patriot Ordnance Factory Minuteman Complete Upper 5.56x45mm NATO 10.50" Black Nitride Barrel Aluminum Black Anodized Receiver 9" M-LOK Handguard Lo Pro DI Gas Block (Mid Length)

Patriot Ordnance Factory Minuteman Complete Upper 5.56x45mm NATO 16.50" Black Nitride Barrel Aluminum Black Anodized Receiver 14.50" M-LOK Handguard Lo Pro DI Gas Block (Mid Length)

Patriot Ordnance Factory P415 Complete Upper 300 Blackout 10.50" Black Nitride Barrel Aluminum Black Anodized Receiver 9" M-LOK Handguard (Piston Driven)

Patriot Ordnance Factory P415 Complete Upper 5.56x45mm NATO 10.50" Black Nitride Barrel Aluminum Black Anodized Receiver 9" M-LOK Handguard (Piston Driven)

Patriot Ordnance Factory P415 Complete Upper 5.56x45mm NATO 16.50" Black Nitride Barrel Aluminum Black Anodized Receiver 14.50" M-LOK Handguard (Piston Driven)

Patriot Ordnance Factory Renegade + Complete Upper 300 Blackout 10.50" Black Nitride Barrel Aluminum Black Anodized Receiver 9" M-LOK Handguard Adjustable Block

PHOENIX HP22/HP22A CONV KIT NIK

POF 00907 RENEGADE+ UPPER 5.56 16 14M RAIL BLK

Primary Weapons 182M111UA0B MK1 Mod 2 Upper 223 Wylde 11.85" Black Brl Finish

Primary Weapons M114UA0B MK116 223 Wylde 16" 4140 Steel Chrome-Lined Blk Hard Coat Anodized Bbl Finish

PWS MK109 MOD 1-M UPPER 300BLK 9.75"

PWS MK109 MOD 2-M UPPER 300BLK 9.75"

PWS MK111 PRO UPPER 223WYLDE 11.85"

PWS MK111 PRO UPPER 223WYLDE 16.1"

PWS MK114 MOD 1-M UPPER 223WYLDE 14.5

PWS MK114 MOD 2-M UPPER 223 WYLDE 14.5

PWS MK116 MOD 1M UPPER 7.62X39 16.1 TRIAD30

PWS MK116 MOD 2 UPPER 223 WYLDE 16.1 FS556

PWS MK116 MOD 2 UPPER 7.62X39 16.1 TRIAD30

PWS MK1MOD1 UPPER 223WYLDE 11.85"

PWS MK1MOD1 UPPER 7.75" .223WYLDE

RADIAN COMPLETE UPPER 14.5IN 223 WYLDE 1:8 RADIAN FDE

RADIAN COMPLETE UPPER 14.5IN 223 WYLDE 1:8 RADIAN GREY

RADIAN UPPER 10.5" 223 WYLDE FDE

RADIAN UPPER 16" 223 WYLDE FDE

RADIAN UPPER 16" 223 WYLDE GRAY

RADIAN UPPER/HANDGUARD MODEL 1 AR-15 15.5" M-LOK BLACK

RADIAN UPPER/HANDGUARD SET 15.5" FDE

RADIAN WEAPONS Model 1 Upper/Handguard Set Radian Black Cerakote 14" Magpul M-LOK

RADIAN WEAPONS Model 1 Upper/Handguard Set Radian Black Cerakote 8.50" Magpul M-LOK

RADIAN WEAPONS R0024 Complete Upper 223 Wylde 14.50" 416R Stainless Steel Radian Black

RADIAN WEAPONS R0025 Complete Upper 223 Wylde 16" 416R Stainless Steel Radian Black

RADICAL INTEGRALLY SUPPRSSD UPPR 300

RADICAL UPPER 300BLK 16" MLOK BLK

RADICAL UPPR 300BLK 10.5" MLOK BLK

RECEIVER UPPER PARTS KIT AR-15

RENEGADE+ UPPER 5.56 10.5" BLK

RIFLE KIT M4 5.56MM 16

RIFLE KIT MID-LENGTH 16

RISE RA-902 STINGER HANDGUARD SLIMLINE M-LOK

ROCK 350L0326 350 LEGEND CAR SS HALFHP UPPER

ROCK BB0470 RRAGE 3G UPPER

ROCK BLK0592 300BLK COYOTE CARBINE UPPER

SCO SCO15 UPPER RECEIVER BLK

SEEKINS BBL 10.5" 223WYLDE BLK

SEEKINS BBL 10.5" 300BLK BLK

SEEKINS BBL 8" 300BLK STS BLK

SHARPS COMPLETE UPPER 556 16" BLK

SHARPS SBUR04 BILLET UPPER STRP W/DUST COVER

SOLGW M4-89 11.5" 5.56 URG

SOLGW M4-89 13.7" 5.56 URG

SOLGW M4-89 13.7" RIFLE 556NATO 30RD

SOLGW STRIPPED UPPER RECEIVER

SOLUS SHORT ACTION RECEIVER

SPIKE'S BBL 5.56 11.5" FN CHF M4 EXT

SPIKE'S BBL 5.56 14.5" FN MID CHF

SPIKE'S BBL 5.56 8.1" BLK

SPIKE'S FLAT TOP UPPER 9MM BLK

SPIKE'S SPARTAN BILLET SET 12" MLOK

SPIKE'S STRIPPED UPPER/LOWER SET FDE

SPIKE'S STRIPPED UPPER/LOWER SET GRY

SPIKE'S STRIPPED UPPER/LOWER SET SPI

Spikes SFT50M4 M4 Flat Top Upper Stripped Multi-Caliber 7075 T6 Aluminum Black Hardcoat Anodized

Spikes ST5BG03 Bolt Carrier Group 223 Rem,5.56x45mm NATO Nickel Boron Steel AR-15, M16 Full Auto

Spikes STU5025M4S ST-15 LE Carbine 223 Rem,5.56x45mm NATO Black

Spikes STU5025R9S ST-15 LE Carbine 223 Rem,5.56x45mm NATO Black

Spikes STU5435MLS ST-15 Enhanced Mid 223 Rem,5.56x45mm NATO Black

TAC SOL XRING 10/22 TD RCVR BLK

TAC SOL XRING 10/22 TD RCVR VR SILVR

Tactical Solutions XRAMB X-Ring 10/22 Upper Receiver 22 Long Rifle (LR) 6061-T6 Aluminum Matte Black

Tactical Solutions XRATDQS X-Ring Takedown 22 Long Rifle (LR) 6061-T6 Aluminum Quick Sand

Tactical Solutions XRGMG X-Ring 10/22 Upper Receiver 22 Long Rifle (LR) 6061-T6 Aluminum Gunmetal Gray

UPPER / HAND GUARD SET 10IN BLK

UPPER / HAND GUARD SET 15.5IN BLK

UPPER MK18 5.56MM RIS II BLK

Wilson Combat TRUPPER AR Style Forged Upper 223 Rem,5.56x45mm NATO 7075-T6 Aluminum Black Hardcoat Anodized

WSM15 BILLET UPPER BLACK

Yankee Hill 110 Flat Top Upper Receiver Stripped 223 Rem,5.56x45mm NATO

Yankee Hill 110BILLET Billet Upper Receiver Stripped 223 Rem,5.56x45mm NATO

YHM UPPER RECEIVER ASSY AR15 A3 FLAT TOP