CMMG A1 Style Rifle Length AR 15 Stock Kit – Buffer Parts Included

SKU: 55CA646

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The CMMG A1 Stock Kit – Classic and Dependable

When the AR-15 was first introduced, it shipped with the A1 stock.  This modern replica by CMMG captures all of the classic features of a Vietnam-era buttstock, with modern manufacturing to ensure it’s functional.  This stock kit includes the the rifle buffer tube, rifle buffer, rifle buffer spring, and of course the stock.

One of the best features of the A1 stock happens to be the length of pull – the distance it puts from the shooter’s shoulder to the trigger.  With an LOP of around 13 inches, most shooters will find this stock is very comfortable to shoulder, and will get a consistent cheek weld.

All CMMG products come with their Lifetime Quality Guarantee.


  • A1 Rifle Length Buttstock
  • CMMG A1 Receiver Extension (Buffer Tube)
  • AR-15 Rifle Buffer
  • AR-15 Rifle Action Spring

Have Questions About this Product?

The AT3 Tactical store has a 90 day no-hassle return policy for products in good condition. You can view the full details of our return policy here.

If you encounter an issue or defect with a product after 90 days of your purchase, you can refer to the manufacturer for a warranty claim. Their policies are below.

CMMG Warranty

Seller warrants to Buyer that for a period of 6 months from the Delivery Date, all Goods will be:

  • Free from any defects in workmanship, material, and design
  • Conform to applicable specifications[, drawings, designs, samples and other requirements specified by Buyer]
  • Fit for their intended purpose and operate as intended
  • Merchantable
  • Free and clear of all liens, security interests or other encumbrances
  • Not infringe or misappropriate any third party’s patent or other intellectual property rights.

Inspection and Rejection of Nonconforming Goods

The Buyer has the right to inspect the Goods for a period of thirty (30) days after the Delivery Date. Buyer, at its sole option, may inspect all or a sample of the Goods and may reject all or any portion of the Goods if it determines the Goods are non-conforming or defective.

If Buyer rejects any portion of the Goods, Buyer has the right, effective upon written notice to Seller, to:

  • Rescind the Order in its entirety
  • Accept the Goods at a reasonably reduced price
  • Reject the Goods and require replacement of the rejected Goods.


If Buyer requires replacement of the Goods, Seller shall, at its expense, promptly/within 30 days replace the nonconforming Goods and pay for all related expenses, including, but not limited to, transportation charges for the return of the defective goods and the delivery of replacement Goods.

If Seller fails to timely deliver replacement Goods, Buyer may replace them with goods from a third party and charge Seller the cost thereof and terminate this Order for cause pursuant to Section 20.

Any inspection or other action by Buyer under this Section shall not reduce or otherwise affect Seller’s obligations under the Order, and Buyer shall have the right to conduct further inspections after Seller has carried out its remedial actions.

Disclaimer: Manufacturer’s warranty is subject to change without prior notice.

Customer Reviews

Based on 9 reviews
Thomas Black
Exactly what I was going for

Wanted the old school look on a 5.45 upper I had, looks great. Fast shipping and great quality.

Thanks for sharing your feedback! We're glad you're satisfied with your purchase.

CMMG A1 Stocks

I ordered 4 stocks, build quality is excellent, packaging is not. All 4 stocks had scratches and scuffs from the metal rifle sling bracket hitting the other stocks in the box. I sent the worst 2 back, AT3 sent them in separate boxes and both, again had scuffs. I assume the damage is also happening in their shipments from CMMG. I paid a premium price for nice stocks ($365) that should not be scuffed up.

So sorry to hear about the issue, Michael. We sent you an email to resolve the issue.

John M Robinson
Not a direct reproduction of the A1 Buttstock

While this stock is very well made it fails to satisfy as a true replica of the A1 stock. While it is an almost insignificant 5/8" shorter that the A2 stock it is made from the same material as an A2 and looks and feels nothing like an original A1 stock. The sling swivel boasts an ability to swivel 180 degrees left and right. This gives the stock an odd looking swivel slot and seems like simply a way to shortcut around doing it right rather than being a significant plus. The buttplate is pure A2 meat tenderizer checkered pattern with 90 degree sharp edges rather than the smooth rolled edges and kinder pattern of an original A1. Lastly the screws provided are allen head rather than slotted like originals. Get this stock if all you want to do is lose 5/8" from your A2 but look for an original if you are building a retro rifle. None of this reflects on AT3 Tactical as they delivered it in a flash and were great to deal with. I can highly recommend AT3 Tactical for your parts.

Thanks for sharing your feedback! We're glad you're satisfied with your purchase.

Jordan Brighi
Great product

Another great product from CMMG. This will be going on a 12.5" AR15 with a 1-4x LPVO

Turner Turbines
Classic look

I wanted to give a Colt 6920 a more classic look so I got this fixed stock in the A1 length. The included buffer system works perfectly and I’m happy with the overall quality of the stock.