If your baseplate stays retained to the magazine metal tube mechanically and not simply by spring interference or glue then you are a better man than me for figuring out a single piece base-plate extender solution. 2150 South 950 East Provo, UT 84606. Toll Free 1-800-821-5783 International 1-801-374-9990 Fax: 1-801-374-9998. info@northamericanarms.com 
Extended Magazine Base Floor Plate For Glock 9mm 357 40 45 Gap Gen 1 4 Wolf 740030288503 eBay
Magazine 10rd HK45. $50.00. OUT OF STOCK. Notify Me. Magazine, Extended Floorplate 8rd USP45C/HK45C. $50.00. OUT OF STOCK. Notify Me. Magazine Extended Floorplate 12rd USP45. $50.00. OUT OF STOCK. Notify Me. Magazine, Extended Floorplate 10rd USP45C/HK45C. $50.00. OUT OF STOCK. Notify Me. Added to Your Shopping Cart. Our factory base plates for H&K magazines come in two designs. Choose a floor plate with an extended base and finger rest or a low profile base plate for maximum concealability. Support reliability during quick mag changes with the proper magazine floor plates and mag base pads made by the best suppliers. Shop now.
HK45 & HK45 Tactical +3 magazine extension adds three additional rounds to the 10 round factory HK45, HK45 Tactical magazine. Super easy to install simply add the mag extension to your existing mag body and follower. An easy 2 minute swap. No gunsmithing needed. Made 100% in the USA out of aircraft grade hard coated aluminum with steel hardware. The gun comes with two 10-round magazines, one with a flush base plate and another with a slight pinky finger extension. Oddly enough, after shooting several hundred rounds, I came almost to prefer the flush baseplate when using the 10-round mags.. SIG P365 grip with extended magazine base plate. 
Magazine Extension 4 Red HK45C USPC 45 HKParts
HK VP 9/40 Magwell - Black. Great Magwell fits perfect love Taylor Freelance Products. ARI. HK VP 9/40 Magwell - Red. I've tried several magwells from competing companies and this is my favorite by far. TF did a great job cerakoting it for me. The Install took minutes, didn't interfere with my grip even with my large hands. Parts listed here are specific to the HK USP pistol model chambered in 9mm, .40 S&W or .45 ACP unless otherwise noted.. Heckler And Koch USP 45 Match Extended Magazine Floorplate. $9.75. 3. Ratings Snapshot 5. out of 5. Would recommend this product.. Heckler and Koch USP 9/40 Extended Floor Plate. $19.00. 7. Ratings Snapshot 5. out of 5.
708279006623. Caliber: 45 Auto (ACP) Capacity: 20-Round. Fits: HK USP45. The follower is constructed of a proprietary DuPont Zytel™ based polymer to ensure a long service life. The springs are made from heat treated Chrome-silicon wire for increased reliability and smooth feeding. The HK45 Pistol is a modern tactical semi-automatic pistol made by Heckler & Koch of Germany. This full sized tactical pistol is chambered in .45ACP and has many features that make it one of the most advanced combat handguns in the world. Recognizing the performance of the HK45, United Defense has produced this high quality aftermarket magazine. 
HK USPC 45 HK45C Magazine Floor Plate Flat HKPARTS NET
A step outside the NAA norm are the easier-loading Sidewinder and Ranger platforms. While the Sidewinder features a swing-out cylinder, our test Ranger II has a break-open top. It's chambered in. New HK German HK45C & USP Compact .45 ACP 10 Round Magazine. With Extended Rubberized Base Plate.. Detail. New HK German HK45C & USP Compact .45 ACP 10 Round Magazine. With Extended Rubberized Base Plate. Works with the following Pistols HK45 Compact HK USP Compact 45 ACP. $42.99. 0 in stock . Click the check box to to signify agreement.
Extended baseplate that adds about .30″ in length to the bottom of the magazine and replaces the stock floor plate on the VP9/P30 & VP9SK, P30SK magazine. The extended length makes for quicker, faster more reliable mag changes. A perfect addition to the HK pistol as it adds a comfortable finger/pinky extension on the VP9SK & P30SK magazine. The Extended Magazine Plate (EMP) adds plus 5 9mm rounds to OEM Heckler & Koch magazines. Following the success of our EMP systems for pistols, the form factor and unique geometric design gives a unified and aggressive aesthetic look to your HK VP9. Strike Industries Extended Magazine Plate for Heckler & Koch VP9. Like the Extended Magazine. 
HK HK45C USP Compact 45 ACP 10 Round Extended Magazine
4 Reviews. $16.99. Add to Cart. HK Magazine Floorplate HK Extended USP Compact 45 ACP 8-Round Blue. 3 Reviews. $5.99. Add to Cart. HK Magazine Floorplate HK P2000, USP Compact 9mm Luger 13-Round Blue. 10 Reviews. The USP45 was already optimized for bullet capacity - the HK45 represents the same design with reduced hand swell and there's no magic on how the bullets then stack. Seems the total gun height / grip length is constrained for some reason. So, I'm working with the following design criteria for the extended baseplate:
