Ar-15/m16 G4 Side Charging Upper Receiver Gibbz Arms
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Ar-15/m16 G4 Side Charging Upper Receiver Gibbz Arms.
The Gibbz Arms G4 Side Charging Upper Receiver is a non-reciprocating upper receiver with a detent to keep the charging handle forward during operation, and uses all mil-spec and most custom bolt carriers without modification. The Gibbz Arms G4 Side Charging Upper Receiver features an enlarged ejection port and will work with AR-15 calibers from 22LR to 50 Beowulf.
- Beveled Ejection Port
- Full 15 Slot Picatinny Rail
- Bolt carrier door in the rear to allow for easy bolt carrier removal and gasses in during operation (important for suppressed fire).
- Compatible with Mil-Spec and most other lowers receivers
- Enhanced cam-pin optimized for side charge upper with Melonite coating is included
- Charging handle cover keeping operating gasses in (also important for suppressed fire).
- Weight: 13.0 oz.
- Dimensions: 8.9 x 2.9 x 2.9 in
- Made in the USA
AR-15, Issue:11, Page:004
Big Book Catalog, Issue:71, Page:004
Ar-15 Complete 450 Bushmaster Upper Receivers Radical Firearms.
Easily Finish Your Big-Bore AR
The Radical Firearms Complete .450 Bushmaster Upper Receiver is a one-piece solution that allows AR owners to finish their big-bore AR builds easily or add a different caliber option for their standard AR-15 lower.
The Radical Firearms Complete .450 Bushmaster Upper Receiver comes complete with everything needed for a fully functioning upper and is built with a 15-inch M-LOK Hybrid rail with Picatinny-rail sections located at four different positions around the circumference of the forend.
- HBAR-contour barrel
- Barrel length: 16 inches or 20 inches
- 16-inch barrel features mid-length gas system; 20-inch barrel features rifle-length gas system
- Gas-block journal measures .936 inch
The Radical Firearms Complete .450 Bushmaster Upper Receiver comes complete with a forward assist, dust cover, charging handle and bolt carrier group.Learn More