SI Defense Billet Matched Upper and Lower Receiver Set AR-15 Generation III Matte
- The 308 receiver sets are compatible with DPMS LR-308 parts. DPMS magazine compatible set also works with Magpul 20LR Pmags. HK G3 magazine version works with G3 magazines exclusively.
- The upper reciever has a High-Profile (older DPMS style) top rail, this will match up with SI defense railed handguards, and others designed for the higher reciever rails.
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