How to Pick the Right AR-15 Handguard Length for Your Barrel
Posted by 3CR Tactical on 23rd Apr 2026
Why Handguard Length Matters
Your AR-15 handguard length needs to match your barrel length and gas system. Too long and it extends past the muzzle or blocks your muzzle device. Too short and you lose rail space and may leave the gas block exposed. Getting this right is straightforward once you understand the relationship between barrel length, gas system length, and handguard d
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Why Your Glock Won't Return to Battery After a Slide Swap: The 5 Most Common Causes
Posted by 3CR Tactical on 15th Apr 2026
You finished swapping slides on your Glock, racked it, and the slide stopped a hair short of fully closing. Or worse — it closes under recoil at the range and hangs up on the next round. The pistol isn’t “broken.” Almost every out-of-battery issue after an aftermarket slide swap comes down to one of five causes, and none of them require gunsmithing to di
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What's in a Slide Completion Kit? Every Part Explained
8th Apr 2026
If you've bought a stripped slide for your Glock, the next thing you need is a slide completion kit. But what's actually in one? And do you need anything else to get your slide running? Here's every part explained.
What Is a Slide Completion Kit?
A slide completion kit (also called an upper parts kit) contains all the small internal components that go inside a Glock slide. Thes
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