Free Shipping & Free Returns*

FREE SHIPPING on Over 250,000 Products

Enjoy free shipping during the holidays! Shop now and get Free Value Shipping on most orders over $49 to the contiguous 48 states, DC and to all U.S. Military APO/FPO/DPO addresses.

Enjoy Our Extended FREE RETURNS

We want to ensure that making a return is as easy as possible! With our Hassle-Free, Extended Holiday Returns, eligible orders placed from November 12, 2025 on will benefit from an extended return deadline (January 13, 2026 or 30 days after receipt of your order - whichever is later). We'll even cover the cost of return shipping. Learn more about our Return Policy.

Shopping Cart
Black River Manufacturing Benelli M4/SBE 3, 7 Round, Magazine Extension Kit
As Low As $125.99 Save Up to 16%
View Product
Compare (0)

Scott's Review of Black River Manufacturing Benelli M4/SBE 3, 7 Round, Magazine Extension Kit

I added this 7 round tube to my Benelli M4 and it was a direct replacement. The carbon fiber is nice, strong and light weight. Black finish on the metal ends matched color well. Came with new spring and follower. You do have to heat the original mag tube with a heat gun to loosen the red locktite about 5-10 minutes on medium heat (Search youtube). The only thing I found negative was the optional clamp on rail attachment didn't fit as well as it could have. It's kind of tight between the mag tube and the barrel and I didn't want to force it and scratch the barrel so I opted to leave it off as I hadn't planned on using it anyways. It has 2 tube spacers that can be removed and it will fit without them. Overall very pleased with the Carbon Magazine tube.
Would Recommend: Yes
1 of 1 found the following review helpful.
Was it helpful to you? Yes | No
Share