Quarter Circle 10, THE AR Pistol Caliber BRAND. Leader in top of the line, dedicated AR15 Pistol Caliber parts. MLOK Handguard
Shipping: All orders are shipped within 72 hours Monday -Thursday 6am - 4pm Arizona Time.
Any order containing a lower receiver will not be shipped until we receive a copy of your FFL. Once received regular shipping policies apply. Submit your FFL Here.
Returns: Quarter Circle 10 offers a 30 day return, refund and exchange policy. See Details.
Free float design
Non-Overlapping mounting system won't interfere with side-charging upper receivers
1.35" Inner diameter.
Continuous top Picatinny Rail
MLOK system allows attachment of wide variety of accessories
Available in multiple lengths to fit your barrel and muzzle devices
Specially manufactured for QC10 by SLR Rifleworks
Actual rail lengths of 4.4", 6.4", 9.4", and 15"