BudsGunShop.com - Front and rear pins
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Does this upper use the large pins (0.25") or small pins (0.155") to attach to the lower. I have a Rock river lower, and it uses the 0.25" pins. thanks
2 Answers
Bushmaster FLTTOP REC 300 16 UPPER
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Eddie, this should be the small pins as is on your Rock River. However, I would confirm this with Bushmaster Customer Service to be absolutely sure at Phone: 1-800-883-6229 or by online inquiry at : bushmaster.com/contact