SAA BASE Builder's AR15 Upper Assembly Free Float Kit:
16" 5.56 NATO M4 1:7 Match 416R Stainless Steel Black Oxide AR-15 Barrel, Billet Stripped Upper Receiver + Upper Parts Kit, Nitride BCG, Gas Block and Tube
Building a new AR15 carbine? This SAA Base Builder's M4 SS Match Barrel kit offers everything to begin that custom build MINUS: rail/hand guard (no barrel nut, delta ring assembly or end cap either), & no muzzle device or charging handle.
This kit offers an M4 profile Match 416R Blackened Stainless Steel 1:7 barrel, Low Profile Gas Block & Gas Tube, a Billet Railed Stripped Upper Receiver and Nitride complete BCG along with the Upper Parts Kit (dust cover and forward assist assemblies).
The complete BCG is assembled and the bolt will be confirmed head spacing with barrel. The rest of the parts are unassembled so SOME ASSEMBLY REQUIRED.
- Barrel: 16" 5.56 1:7 M4, Polygonal Rifling, Match 416R SS Black Oxide Finished, 1/2x28" thread
- Upper Receiver: Billet Stripped AR15 7075-T6
- M4 feed ramps on both Upper and Barrel
- Complete Upper Parts Kit (Forward Assist Assembly & Dust Cover Assembly)
- Nitride Complete Bolt Carrier Group (BCG), Nitrided MPI 9130 Bolt with Phosphate Extractor
- Bolt confirmed Head Spacing with Barrel
- Low Profile Nitride Steel Gas Block (.750") & Steel Gas Tube & Roll Pin
- All Parts Made in the U.S.A.
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