The PLGR-II/HNV-2000 is more advanced than the original Precision Lightweight GPS Receiver PLGR (PSN-11) but not as much as the Defense Advanced GPS Receiver DAGR (PSN-13). It's much more modern than the Small Lightweight GPS Receiver SLGR (PSN-10).

The AN/PSN-11 Precision Lightweight GPS Receiver (PLGR, colloquially "plugger") is a ruggedized, hand-held, single-frequency GPS receiver fielded by the United States Armed Forces. It incorporates the Precise Positioning Service — Security Module (PPS-SM) to access the encrypted P(Y)-code GPS signal .

Miniature PLGR Engine-SAASM (MPE-S) Type II delivers geolocation and precise positioning capabilities for military navigation, tactical communications, battlefield computing, and other Command, Control, Computers, Communication, and Information (C4I) equipment. At its core, the MPE-S contains the Selective Availability Anti-Spoofing

Miniature PLGR engine receiver. Increased security and anti-jam capabilities. The MPE-M is size-compatible with the MPE-S receiver, while offering a new security architecture for enhanced integrity, exclusivity, and resiliency.

Rockwell Collins 5-Channel PLGR, 12-Channel PLGR II and 12-Channel DAGR. Our receiver is interchangeable with the DAGR receiver, having the same mechanical size, fit and electrical interfaces. This SPS version application reduces the investment of a full redesign or requalification when transitioning to/from a DAGR receiver is required.

The PLGR II and VPLGR II are improved hardware over the basline PLGRs. The VPLGR was for use in Vehicles and seems to have addressed some of the human factor problems. In addition it's a dual frequency receiver. The PLGR, PLGR-II and VPLGR-II are all currently out of production.

Selected as the standard DOD handheld and vehicular GPS receiver Rockwell, the world leader in GPS hardware and software, developed the AN/PSN-II PLGR to provide a small, lightweight, handheld precision satellite positioning and navigation system. The receiver contains a PPS-SM module, which allows it to be handled as unclassified when keyed.

See how our Defense Advanced GPS Receiver (DAGR) provides secure military GPS services in the most reliable and proven handheld form available today.

PLGR+96, retains the low price, extended battery life and advanced navigational features of PLGR+, while incorporating advanced P/Y code positioning technologies, thereby increasing the unit’s accuracy to the sub-meter level. PLGR+96 is flexible enough to meet the needs of a wide variety of military users.

The PLGR-II was made for Special Operations and some foreign governments (Australia, UK?). It's a 12 channel L1& L2 receiver. Montgomery Design page about PLGR and PLGR II. "MDI worked with Rockwell to adjust the surfaces of their prototype unit, …