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HK USP45 & USP45 Tactical +5 Magazine Extension

SKU: HKP-18347

HK Magazine Extension +5 Capacity For - USP 45 & USP 45 Tactical


HK USP45, USP45 Tactical magazine extension +5 adds five additional rounds to the full size HK USP45 & USP45 Tactical 12 round magazine. Super easy to install, simply add the mag extension to your existing mag body and follower. An easy 2 min swap. No gunsmithing needed. Made 100% in the USA out of aircraft grade hard coat anodized aluminum & steel hardware. Ultra low profile, & rock solid. This offering is simply the finest +5 mag extension for your HK USP .45 firearm available. With the addition of the +5 mag extension the round count in the magazine will increase from a 12 round magazine to a full 17 rounds of .45 in your HK USP45 magazine. Ideal for competitive shooters, concealed carry or for everyday use while at the range.

Fits the USP 45 12 round magazines:

  • HK USP 45
  • HK USP 45 Tactical
  • HK USP 45 Expert
  • HK USP 45 Elite
  • Does not fit the HK45 or HK45 Tactical (although we do offer a +3 for the HK45 model)
  • Will not fit or work with the 10 round USP45 magazines



Condition: New
Caliber: 45 ACP
Sub-Type: Extension
Magazine Capacity: +5
Price: $49.95
In Stock
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HK USP45 & USP45 Tactical +5 Magazine Extension
HK USP45 & USP45 Tactical +5 Magazine Extension
HK USP45 & USP45 Tactical +5 Magazine Extension
HK USP45 & USP45 Tactical +5 Magazine Extension
HK USP45 & USP45 Tactical +5 Magazine Extension
HK USP45 & USP45 Tactical +5 Magazine Extension
HK USP45 & USP45 Tactical +5 Magazine Extension
HK USP45 & USP45 Tactical +5 Magazine Extension
HK USP45 & USP45 Tactical +5 Magazine Extension
HK USP45 & USP45 Tactical +5 Magazine Extension
HK USP45 & USP45 Tactical +5 Magazine Extension
HK USP45 & USP45 Tactical +5 Magazine Extension
HK USP45 & USP45 Tactical +5 Magazine Extension
HK USP45 & USP45 Tactical +5 Magazine Extension
HK USP45 & USP45 Tactical +5 Magazine Extension
HK USP45 & USP45 Tactical +5 Magazine Extension
HK USP45 & USP45 Tactical +5 Magazine Extension
HK USP45 & USP45 Tactical +5 Magazine Extension
HK USP45 & USP45 Tactical +5 Magazine Extension
HK USP45 & USP45 Tactical +5 Magazine Extension
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Product Reviews

Write your own review


"USP .45 extension"

John on 8/6/2018 10:03:07 PM


Order Fulfillment:


Desired Compatibility:


USP 45

Product Quality:


Overall Product Rating:


I like that Iím still using my factory HK mag. Install took less than 5 min. My +5 extension will easily take 3 additional rds. With 4 additional rds in it becomes difficult to seat the mag with the slide closed (but doable). I have not been able to get a 5th round in. Never the less I still recommend. Aside from intermittent issues locking the slide on the last shot it feeds reliable.


"Works, but."

Jonathan on 7/28/2018 2:59:46 PM


Order Fulfillment:


Desired Compatibility:


USP 45 Full Size

Product Quality:


Overall Product Rating:


Easy to change, but uses existing spring... so, while it works fine, feeds fine, no issues. It does NOT lock the slide back on an empty mag... just not enough spring pressure left.