Details
Details
The Strike Industries Flat Wire Carbine Spring is an inexpensive and easy upgrade for your AR-15. Designed to smooth recoil, this spring produces an increased bolt load yet requires less compression force improving reliability in cycling.
SI Flat Wire Springs are made from cryogenically stress relieved 17-7 PH steel to provide greater consistency, longer spring life, and increased resilience to high cyclic rates.
Features:
- Cryo-cycled 17-7 PH steel
- Decreased harmonics lessens system vibration for faster follow up shots.
- Increased bolt load
- Reduces distracting AR twang
- Outside diameter: 0.94"
- Inside diameter: 0.75"
- Length: 13 7/8"
- Gauge (Flat Wire Profile): 0.045" x 0.0935"
Specifications
California Prop 65 warning
WARNING: This product can expose you to chemicals, which are known to the State of California to cause Cancer and Reproductive Harm. For more information go to www.P65Warnings.ca.gov.Ratings & Reviews
12 reviews
Flawless after 1 year and thousands of rounds.
by Garrett -
I've had this spring in a 11.5 build for about a year now and it has been flawless. I'm not sure why the other review says its louder and has more drag than a round spring because it definitely doesnt. In fact it's about the same with the added benefits of a flat wire spring. Look them up. The loudness has a lot to do with the inside surface of cheapert buffer tubes. If your looking for quite, look for the JP silent captured spring!! It makes the AR action feel very high quality!
Too Much Noise And Drag From Flat Wire Extra Surface Contact
by Gary
I'll give this item 2 Stars for being pretty but I wouldn't give you 2 bucks for it.
There was nothing wrong with my stock spring but I thought this might be better. Nope.
My stock carbine spring was smooth and went "ssshhhhhh" when charging. This one goes "SWOOOSSHHHH" and has noticeable drag.Here's why. The stock round spring only contacts the tube with a small surface on the edge of a circle. The flat wire spring contacts the tube with the entire thickness of the flat wire.That's a lot more surface area.
I replaced this with a JP Polished Extra Power spring and there is a world of difference. Now there is a subdued "shhh" when being charged and the cycle is glass smooth and lighter even with a stronger spring. Very noticeable.
5 Stars to JP and, as usual, 5 Stars to Primary Arms.