Sprinco M4 / AR-15 Enhanced 4-Coil Extractor Spring Upgrade Kit - 3 Pack
- Pack of 3
- 4 coil design
- Optimal for 18” rifles
- For AR-15 BCG
- Made from Chrome Silicon wire stock
- Heat treated, stress relieved, and cryogenically processed
- Easy to install
- Includes Mil-Spec extractor insert and Viton O-Rings
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
by Anthony C -
As always, Sprinco doesn't disappoint. Very well made and great fit and finish. Primary Arms is my go too spot. Excellent service and shipping times!
Happy I found these springs!
by Roguemale -
When I started building my own AR 15s this is a upgrade that I put in the bolt as a normal course of the build, I also changed the trigger sear and hammer to nickle boron and installed a JP spring set also as a normal course of the build.
It's been quite a while since I was able too find them, and I seem to remember that they were a BMC gunfighter upgrade back then, in any event I know where too get them now .
Primary Arms comes through again!