The Seekins SP10 is a .308 Winchester AR-10-pattern rifle (Seek part no. 0011310010FBLK) that expands Seekins’ SP10 line for shooters who want repeatable, extreme accuracy from a semi-automatic platform. The Seekins iMRT-3 upper receiver and SP3Rv3 handguard combine for a rigid, no-flex platform that holds a zero under hard use, and the SP10 lower receiver offers full ambidextrous controls for effective operation from either side. It’s fitted with an 18-inch 5R match-grade stainless steel barrel and a low-profile adjustable gas block for tuning reliability with or without a suppressor. Feeding from a 20+1 capacity and weighing approximately 19.1 lbs, this SP10 gives precision-minded shooters serious .308 performance without leaving the AR platform behind.

Key Specifications

• Chambered in .308 Winchester/7.62 NATO for extended reach and terminal performance.
• Uses a 1-in-8-inch twist rate for match-grade stability.
• Fitted with an 18-inch 5R match-grade stainless steel barrel.
• Feeds from a 20+1 capacity magazine setup.
• Weighs approximately 19.1 lbs as configured.
• Equipped with ambidextrous controls for operation from either side.
• Ships optics-ready, leaving the top rail clear for a scope or red dot.
• Runs semi-automatic operation on the AR-10 platform.
• Built around the Seekins iMRT-3 upper receiver for a rigid, no-flex platform.
• Wears the Seekins SP3Rv3 free-float handguard.

Frequently Asked Questions

What caliber is the SP10 chambered in? It’s chambered in .308 Winchester/7.62 NATO, giving it extended reach compared to a standard 5.56 AR.

Are the controls ambidextrous? Yes, the SP10 lower receiver offers full ambidextrous controls for use from either side.

Buy the Seekins SP10

Precision-minded shooters who want serious .308 performance from an AR platform should look closely at the SP10. Order this Seekins rifle from our AR rifle selection at Schaefer Defense, and we’ll ship it insured to your local FFL from our Lubbock, Texas shop.