• Adams Arms **

  • AK-47 Parts and Accessories

  • Apex Machining Handguard

  • Apparel & Gift Certificates

  • AR10 & Variants Parts

  • AR15 Parts

  • Back Up Iron Sights BUIS

  • Battle Arms

  • Biometric Locks and Safes

  • Bipods - Quick Detach - Heavy Duty

  • CAA Command Arms Accessories EMA

  • cmmg

  • Complete AR-15 Upper Assemblies

  • Daniel Defense Inc.

  • Geissele SHIPS FREE

  • Eotech Holographic Sights **

  • FAB Defense & Mako Tactical

  • Flash Hider - Muzzle Brake

  • Flashlights & Lasers

  • GG&G Tactical Products

  • Guntec USA

  • Handguards - AR-15 Forearm - Quad Rail

  • KNS Precision


  • Magazines

  • Magpul Industries

  • Matrix Arms

  • MI Midwest Industries **

  • Mission First Tactical MFT


  • Optics - Holographic - Scopes

  • Pistol Grips Modular AR15 AR10 M16

  • Primary Weapons Systems **

  • RRA Rock River Arms

  • Samson Manufacturing **

  • Seekins Precision**

  • Shotguns

  • Sightmark

  • Slings and Accessories

  • Spike's Tactical

  • Stocks - AR15 M4 AR10 G3 FAL Buttstocks

  • Streamlight

  • Strike Industries

  • Triggers

  • Troy Industries

  • UTG Ultimate Tactical Gear

  • Vertical Forward Grips AR15

  • VLTOR Weapons Systems

  • YHM Yankee Hill Machine Company

  • View All Products ->

    All Products sorted by Categories ->

    All Products sorted by Manufacturers ->
    Specials more
    YHM Yankee Hill Hooded Front Flip Sight Tower (YHM-9394-H)
    YHM Yankee Hill Hooded Front Flip Sight Tower (YHM-9394-H)
     $102.00  $69.95 
    Who's Online
    There currently are 67 guests online.
    How to fix 300BLK cycling trouble by Aaron Henderson

    The 300BLK can be a bit tricky to initially work out (similar to AR pistols) with common problems being jams, cycling trouble. It should be smooth once you get the correct parts with quality mags and ammo. Here are a few recommendations. If you make any changes to a factory built upper (removal of gas block or handguard change), make sure the gas block is correctly replaced to completely cover the gas hole. Also ensure the lower receiver's buffer tube is not over-rotated, so that when the upper and lower are put together, the upper doesn't hang up on the buffer tube (instead of seating properly into the lower). Over-rotated buffer tube can cause the carrier to ride up and bind the action.

    1: We definitely recommend a standard 3oz buffer if not cycling.
    2: The spring really depends. Carbine springs are not created equal, so you don't necessarily need a reduced power spring, but it is always a good place to start if you are having issues with a 300blk.
    I offer lightweight option AR15 spring here:

    3: H2 buffer is definitely going to be a no go, at least with subsonic ammo.

    4: 300blk is such a low pressure round, I recommend not even bothering changing the Adams Arms gas positions when switching from subs to supers and just keep it on full gas.

    Adams has changed from standard 1:12 twist to 1:8. With the 1:12, anything bigger than 190gr will keyhole slightly. They changed to 1:8 so that this will not be an issue.

    This article was published on Thursday 16 June, 2016.
    Current Reviews: 0 Write Review
    Tell a friend
    Tell a friend about this article:  
    McAfee SECURE sites help keep you safe from identity theft, credit card fraud, spyware, spam, viruses and online scams

    Quick Find
    Use keywords to find the product you are looking for.
    Advanced Search
    Your Account
    Your Email Address
    Your Password
    Featured more
    PHASE 5 Tactical Revolving Sling Attachment Solution (REVO SAS)
    PHASE 5 Tactical Revolving Sling Attachment Solution (REVO SAS)
    Reviews more
    Black Hole 20" Match 936 Bull Rifle Polygonal AR15 Sniper Barrel
    Black hole weaponry reqested me to return the barrel I sent ..
    5 of 5 Stars!
    New Articles (0)
    All Articles (15)
    AR-15 Common Questions (15)
    Terms and Conditions
    Shipping and returns
    Is Inventory LIVE?
    What is PlugNpay?
    Is heartbleed safe?
    Gift Voucher FAQ
    Contact us
    Positive SSL on a transparent background
    VTSupply is PCI Compliant
    Follow VTSupply on Twitter
    Support GOA
    Take Action or Lose
    Support 22kill
    Support NRA

    McAfee SECURE sites help keep you safe from identity theft, credit card fraud, spyware, spam, viruses and online scams