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Quarter Circle 10, THE AR Pistol Caliber BRAND. Leader in top of the line, dedicated AR15 Pistol Caliber parts. .40 S&W Glock Style Bolt Assembly Advanced blowback design
Manufactured to function reliably with Glock .40 S&W, .357 Sig, and 10mm magazines
Drop-in Installation
8620 Steel Bolt QPQ Nitride treated for maximum durability and wear resistance.
Heavy Duty Extractor Removable mass 15 oz assembled weight.

DISCLAIMER: This product is not manufactured, authorized, endorsed, or warranted by GLOCK. GLOCK does not warrant or represent that this product is compatible with GLOCK pistols.





Quarter Circle 10


AR15, Glock


10MM, .40 S&W


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Quarter Circle 10 .40 S&W/10MM Auto Complete Bolt Assembly

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  • MSRP$250.00

Total in stock: 0

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5004 State Highway 74 Cape Girardeau, MO 63701
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