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PRC Gravity Block-Slimline

This slimline stackable weight system is available with M-Lok attachment, weighs 1 pound each, and are machined from steel billet with a nitride finish. These Gravity Blocks are designed for mounting on the sides of your MLOK rail to allow ARCA accessories to be used or fully adjusted on the bottom ARCA rail and can be easily added or removed in seconds with a single Allen key. Available as a single MLOK Block or MLOK Block with Attached Stacking Block.
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  • The M-Lok stacked Block set consists of (1) M-Lok block and (1) stacked block.
  • The ADM Stacked QD Block set consists of (1) ADM QD block and (1) stacked block.


  • M-Lok Block- 16 oz
  • ADM QD Block- 18 oz
  • Stackable Block- 16 oz

FFL Terms and Conditions - Any items placed on the same order as a firearm/lower receiver will also be shipped to the FFL. If you would like additional items shipped to you directly, please place them on a separate order. To expedite your order, please have your dealer fax or email their FFL to us. If the dealer you are using to transfer a firearm has not sent us a currently updated FFL to put on file, there will be an extended period of time needed to process your order. Due to the high volume of orders, please allow up to two weeks for delivery of firearms. Email: [email protected].

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