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WTS Sterling Mark IV SMG recoil spring New made


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Custom made new Sterling SMG recoil spring, this is the rear main spring which does most of the work. No other spring manufacturer makes these commercially available. This is 5-10%+ more power over stock, closed end coils are ground like the original factory spring. Have 50+ units made, quantity discounts available. Fits and functions very well. Bring your unit back to factory specs for better running over the 40-70 year old original recoil spring.. $13 each, $9 priority mail shipping.

Below is copy/pasted feed back from a satisfied customer:

Tested today with several different makes of ammo. No excessive bolt travel, worked 100 percent, even with 147 grain.

Email if interested,

Bill

wspringfield@comcast.net

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Edited by bspring
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