The Armaspec Stealth Big Bore Recoil Spring (brand part number ARM253BB) is a heavier-duty Gen 4 recoil spring built specifically for big-bore AR platforms chambered in 458 SOCOM, 450 Bushmaster, or 50 Beowulf. Weighing 5.7 ounces, this stainless steel spring with a black finish uses the same buffer-tube-rub reduction design as Armaspec’s standard Stealth line, but scaled for the heavier recoil impulse of a big-bore cartridge, keeping the spring from rattling against the tube wall for smoother, quieter cycling under harder recoil.

Key Specifications

• Weighs 5.7 ounces, sized for big-bore AR platforms.
• Built specifically for 458 SOCOM, 450 Bushmaster, and 50 Beowulf chamberings.
• Built as Gen 4 of Armaspec’s Stealth recoil spring line.
• Constructed from stainless steel with a black finish.
• Designed to keep the buffer spring from rubbing against the buffer tube wall for smoother, quieter operation.
• Features an adjustable spring weight to help fine-tune recoil impulse.

Frequently Asked Questions

What calibers is this spring built for? It’s built specifically for big-bore AR platforms chambered in 458 SOCOM, 450 Bushmaster, or 50 Beowulf.

Why does a big-bore build need a heavier spring? Big-bore cartridges generate a harder recoil impulse, so a heavier, purpose-built spring like this one helps control bolt velocity and reduce mechanical wear and noise.

Buy the Armaspec Stealth Recoil Spring, Big Bore Gen 4, Stainless/Black, 5.7 oz

Give your big-bore AR the recoil control it needs with a purpose-built spring. Order the Armaspec Big Bore spring from our AR buffer system lineup, shipped fast from our Lubbock, Texas gun shop.