115851 Upper-BCM-URG-MID-16
115515 Upper-BCM-URG-MID-14-BFH-ELW-MCMR-13
115512 Upper-BCM-MK2-URG-MID-14-MCMR-13
115747 Upper-Geissele-08-548
30341 Upper-Geissele-08-244ODG
13657 Part-BCM-EXSPRING-3
21486 Part-BCM-BCG-AUTO-MP-FDE-IB
22623 Upper-BCM-MK2-URG-300BLK-16-MCMR15
13658 Part-BCM-SOPMOD-Bolt-Kit
90939 Part-DB-556-DLC
116506 Parts-Geissele-05-490
18242 Upper-Geissele-08-218B
116505 Upper-Geissele-08-315