• Rock Island/Para +4 Basepad - Alum - Black

    • Rock Island/Para +4 Basepad - Alum - Black

    $36.99
    (51 reviews) Write a Review
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    Product Description

    Rock Island users have asked us for a custom basepad to match our "Fattie" magwell ever since we brought it out. This is that basepad. (Also works on Para-Ordnance P-16 and P-18.)

    • +4 capacity in 9mm or .38 Super (+2+ in .40 or 10mm) for 21+1 and sometimes 22+1 performance!
    • Can be used on a .45 -- just remove the plastic insert, or trim the "legs" of the insert.
    • Legal for USPSA, 3-Gun competition (meets the 140mm rule)
    • Works with TF "Fattie" magwell and RIA factory magwell.
    • Uses the stock spring.
    • Includes modified Arredondo Accessories insert for jam-free function beyond 18 rounds

    Note: Works with Mec-Gar Para mags, and with Rock Island mags. HOWEVER, Rock Island recently started offering magazines that are slightly longer than prior generations (notably in .40). If you are shooting USPSA events, be sure to measure your assembled mags to be sure they fit the USPSA gauge!

    Weight: 1.75 ounces
    Material: Aluminum
    Color: Black

    Note: Does not fit the Rock Island 5.0

    NOTE: Due to state department restrictions we cannot ship this part internationally.

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    • 5
      Rock island/para +4 basepad

      Posted by Gerry Maloney jr on Mar 21st 2025

      Great product, took me about two mintes to install the two that I bought. Looks great, great construction, and shipped fast, maybe a week and a half tops.

    • 5
      Rock Island magazine base pads

      Posted by Bill Hoak on Mar 5th 2025

      I have purchased several of these and haven't had any issues. Very happy with my purchase.

    • 5
      Had failures at first -- but it was my mag spring!

      Posted by Charles on Dec 23rd 2024

      Great service, easy install. I had some issues with the +4 baseplate and was quickly provided with a fix for it. The baseplate fits my magazine perfectly, and I will be buying more.

    • 5
      Good for duty

      Posted by Lions Den on Oct 7th 2024

      They lock up tight and would go through the storm with you. Everything about this product is tough and precise.

    • 5
      Base plates

      Posted by Jeff Bowman on Jun 16th 2024

      Well made, work excellently

    • 5
      RIA Ultra Match Pro baseplate

      Posted by BigSturk on Apr 8th 2024

      Great quality. Easy installation. Love the weight. I would recommend this product.

    • 5
      Para 140 mm basepad

      Posted by dave hearth on Mar 17th 2024

      Perfect fit a and a quality product. Actually the 2nd time purchased.

    • 5
      4 plus base pad

      Posted by Adam Shillingburg on Feb 24th 2024

      These fit perfectly. Easy to install and the finish is spot on. I will be ordering more.

    • 5
      Easy installation, great quality

      Posted by Bill Hoak on Feb 14th 2024

      I liked so much, I ordered more.