AR15 TBA13 2021 ALPHA 6 Position Mil Spec AR Buffer Tube Butt Stock Kit


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Item Condition
Factory New
In Stock

Description for AR15 TBA13 2021 ALPHA 6 Position Mil Spec AR Buffer Tube

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This is Trinity Force 2021 version of the ALPHA MK2 stock. The part number is TBA13. Unlike other ALPHA stocks, this TBA13 is the ONLY cobra series stock that is Made in USA.

The Cobra Stock MK2 features our own Patented locking system, battery storage compartments and an oversized cheek rest. The Cobra MK2 is easy to install and remove on the any Mil-Spec buffer tube. The butt-pad profile is angled to accommodate plate carriers and the aggressive texturing will ensure minimal movement when manipulating the rifle under stress. Multiple sling points and lightweight snag-free construction the Cobra fits into most builds with ease. For your safety, We recommends this part be installed by a competent, qualified gunsmith/installer with an understanding of the weapon platform that the part is being installed on. Always make sure the firearm is unloaded and pointed in a safe direction when working.

  • Made in the USA
  • Patent pending locking system
  • QD sockets / 1.5″ Sling loops
  • Snag-free design to prevent any tangles with gear
  • Two different types of ambidextrous sling mounting options, including QD swivel sockets
  • Rubber textured butt-pad
  • Lifetime warranty

Product Specifications:

  • Length (in): 7.5
  • Height (in): 5
  • Width (in): 3
  • Weight (oz): 12.8
  • Material: High-Density Polymer/Rubber
  • Color: Black
  • Length of Pull Range (in): 3.25
  • Length of Pull Collapsed (in): 11
  • Length of Pull Extended (in): 14.5

This listing also comes with  MIL SPEC Buffer Kit for AR15

 .223/5.56 Rifles
Kit comes with:
1- MIL SPEC 6 Position Buffer Tube
1- Buffer
1- Buffer Spring
1- Castle Nut
1- End Plate

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Are you a dealer, shop owner, armorer, weekend show vendor or have a dozen buddies that might want to do a group buy?  We are here to help you!  

On many items, we can offer bulk wholesale pricing.  We are the manufacture of many items, the direct importer for many more and can save on shipping and handling on everything by shipping in bulk.  And….We are more than willing to pass the saving along to you!

On any of our items you see that you might like to buy in bulk, send us a message with what you would like and how many.  We will make a special listing for you with the bulk pricing and send you the link.  Just be aware that after they go 'live' someone else could jump on it, so let me know if there is a time you would like it up.  Often these prices will be way too low to advertise!  You will need  at least ten of each item to be shipped at a time, and the more you want, the lower the price can be. 


We accept Visa, Master, Discover and America Express at the checkout. If you prefer to pay by check, money order or Paypal, please click contact seller via email. 

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We ship all items within one business day of receiving cleared payments. For payments received by 2pm PsT(Pacific Daylight Time), the package usually ships in the same day. 

Free shipping  within 1 business day with tracking number.

No international shipping!


You can return any purchase that is Undamaged in like new condition within 30 days for full money back or exchange.

If you have any question, please click contact seller. We always reply emails within one business day.

Purchase Eligibility

We have to accept the fact that things are different than when we were younger, so please make sure you can legally order and possess this item BEFORE you submit your bid. All NFA rules apply, where applicable. YOU are responsible to following ALL laws and regulations regarding the ownership, possession and end use of this item. If there are any restrictions on your legal ability to own and use a firearm or ammunition, you will also not be able to purchase this product.

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NOTE: Prices, specifications and availability are subject to change without notice. The seller(s) of this item assumes all responsibility for this listing & reserves the right to correct typographic, photographic and/or descriptive errors at any time. Some items listed may not be legal in your area. Be sure to check all local, state, and federal laws before purchasing anything on Weapon Depot.